net: sockets: tls: Clarify missing entropy warning

Change the wording of the warning printed when there is no entropy to
hopefully remove any doubt that there might be security in TLS without
an entropy source.  TLS connections with insufficient entropy are
trivially decodable, and should not be relied on for any type of
security.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

subsys/net/lib/sockets/sockets_tls.c

@@ -283,7 +283,7 @@ static int tls_init(const struct device *unused)
 
 #if !defined(CONFIG_ENTROPY_HAS_DRIVER)
 	NET_WARN("No entropy device on the system, "
-		 "TLS communication may be insecure!");
+		 "TLS communication is insecure!");
 #endif
 
 	(void)memset(tls_contexts, 0, sizeof(tls_contexts));